<div class="header">
  <div class="logo">
    <a href="index.html"><img src="/images/logo.png" alt="宇航化工"></a>
  </div>
  <ul class="header-items clearfix">
    <li class="header-item">
      <a href="particulars.html"><span>产品</span></a>
    </li>

    <li class="header-item">
      <a href="news.html"><span>新闻</span></a>
    </li>
    <li class="header-item">
      <a href="about.html"><span>我们</span></a>
    </li>
  </ul>
  <div class="header-menu menu-y">

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  <div class="menu-content">
    <ul class="menu-items">
      <li class="menu-item">
        <a href="index.html"><span>首页</span></a>
      </li>
      <li class="menu-item">
        <a href="particulars.html"><span>产品中心</span></a>
      </li>
      <li class="menu-item">
        <a href="news.html"><span>新闻中心</span></a>
      </li>
      <li class="menu-item">
        <a href="workshop.html"><span>生产中心</span></a>
      </li>
      <li class="menu-item">
        <a href="qualification.html"><span>资质认证</span></a>
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      <li class="menu-item">
        <a href="user.html"><span>用户见证</span></a>
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      <li class="menu-item">
        <a href="cooperation.html"><span>合作客户</span></a>
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      <li class="menu-item">
        <a href="about.html"><span>关于我们</span></a>
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      <li class="menu-item">
        <a href="group.html"><span>宇航团队</span></a>
      </li>
      <li class="menu-item">
        <a href="connection.html"><span>联系宇航</span></a>
      </li>
    </ul>
  </div>
</div>